The National Library of France, the world's largest library, digitizes its sound archives. This exceptional collection includes all the sound production broadcast on the territory of France since the beginning of the capture of sound between 1900 and 1963. The public has access to no less than seven collections bringing together the treasures of the French musical heritage in classical music , jazz and blues, international variety, world music, spoken documents and children's music. More than 100,000 titles are thus made available on download and streaming sites for a vast background. A successful technological challenge for the BnF.